Support for existing firmware projections and new simulation API

[cbespin]

Add back support to synthesize existing firmware projects by removing the SystemVerilog always_latch statements in two modules.
At the same time, adapt to new(er) cocotb usage.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 32.01%. Comparing base (92d4147) to head (558fb71).
Report is 40 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #221      +/-   ##
==========================================
- Coverage   32.67%   32.01%   -0.67%     
==========================================
  Files          85       86       +1     
  Lines        5800     5926     +126     
==========================================
+ Hits         1895     1897       +2     
- Misses       3905     4029     +124     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[cbespin]

Separated the topics into two PRs, closing this in favor of #223.